I do have a friend who ended up watching FMA Brotherhood and AoT on his own, and he loved them both, especially brotherhood. But he hasn't watched any other animes since so I think it was a one (two) time thing

Always the first one I use if I watch with someone that is already a fan or those that have minimal/no knowledge of anime. Easily at least a dozen people I've worked it on with only one guy I know that didn't like it because of the fan service early on of the girls in the karaoke bar. Other than that a handful of people have borrowed it to watch fully.